The best way to help someone who has just been raped is to first of all take the victim to the hospital for proper medical care and attention. After that is done and preventive measures taken for any possible sexually Transmitted diseases, such a person should now be recommended to get a professional help in helping them heal physically and emotionally. It is a traumatic event and such shouldn't be hidden. The more she talks about it, the more she heals.
Sorroun d her also with love and affection from those closest to her and make her understand that it is no fault of her that she was raped.