She is a beauty. How old is she? It's generally easier to make friends with chicks than older birds but the magic trick is the same - chickens love to eat. You might try throwing some treat for her, when she starts to look forward to that, you can throw them closer to you. If you sit down near her, eventually she will want to investigate you and see if you have more. Just be cool and calm, so she doesn't get frightened. It's best not to try and grab her but , let her approach you. Some chickens just aren't the lap or shoulder type but, can be friendly in other ways.
Is she the only chicken you have? If there were others, she would learn faster that you are not a predator. She will come around - patience and food are all you need. Welcome to BYC.