R. A great question! You do this the same way you display your faith and love of God in any other place you are. You live it freely and openly.
Look at the promises we make when we affirm our baptism. Among them we promise to “Proclaim the Good News of God in Jesus Christ through word and deed.”
We believe (see Luther’s explanation of the Third Article of the Creed) that what transforms lives is the work of the Holy Spirit. We understand that while the Holy Spirit can act in any way it desires, the promise is that the Spirit is present in the proclamation of God’s Word. So, as our lives and our speech proclaim that Word, the promise is that the Holy Spirit will go forth from that and be at work in people’s lives.
In short, the best way to display your faith and love of God is… to display your faith and love of God. You might not want to turn every conversation into a theological discourse, that would get as annoying as the person who wants to talk about Game of Thrones all the time! Rather, be authentic in your conversations. If church or your beliefs would come up in a conversation because of the context, bring it up. It’s no different than sharing the love of a favorite football team or movie and is ultimately more important.
As far as actions, a friend of mine had a saying at the bottom of her emails which read, “Remember, you may be the only Bible some people ever read.” As frightening as that sounds (at least to me!) it is true. So, make sure you treat the people at work in a way that reflects your Christian beliefs and values. When folks ask you about this, be honest in saying why you behave in such a way. Then, if you feel bold, invite them to join you at church or a church event sometime!
Let me know if you have further questions by contacting me.