This verse is actually prophetic, that is, it has an original significance and a future significance. It could be called a parable. See Matthew chapter 13 on Jesus teaching and explaining parables. Much of the stories and events of the Old Testament have a futuristic overture and are repeated. The making of man in the image of God was not the physical man made from the earthly elements, but rather that he was made a living soul. It's through the soul that we have eternal existence and know to do right and wrong. God is a Spirit (John 4:24). God has taken on a physical form at times to interact in this physical world. He walked in the garden with Adam and Eve (although we do not know the form). He appeared unto Mosses in the mount. Was a fire and cloud over the Israelites traveling through the wilderness. His glory filled the tabernacle, the temple. And in the latter days walked the earth as Jesus Christ. He being the image of the invisible God.
13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
14 In whom we have redemption through his blood, even the forgiveness of sins:
15 Who is the image of the invisible God, the firstborn of every creature:
1 God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
2 Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
3 Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high:
1 Corinthians 15:
45 And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit.
46 Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual.
47 The first man is of the earth, earthy; the second man is the Lord from heaven.
48 As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly.
49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.*
God created the first man, Adam, in His image. Creating man in the image of God is a work that continues today through the ministry of Jesus and His disciples and all those who follow and share His teachings. Read what Jesus said to Nicodemus in John chapter 3 about being born again, not in the body, but in the Spirit; not of the earth, rather heavenly; in the image of God.
The 'us' and 'our' does not mean God talking to himself. The 'us' and 'our' does include the plural group of; God, Christ Jesus, and all who have followed in His ways and are living in the image of God. Those who are sharing with others to seek spiritual/heavenly things and not the things of this world, that the hearers also could be transformed to be in the image of the living God.