Through her experiences, she was trained to be distant to humans. You need to break that habit with new behavior. You need to associate nice things, pleasant experiences with you. Approach her with calm and relaxation.

Food is a good way to get through to an animal. Sit close to the bowl when she eats. Hand feed not only treats, but regular kibble.

Get a soft small brush and a comb. My cat would almost lick a dog for a good grooming. Gentle and slow. At first, short times, and increase.

Speak to your cat. Sing to your cat. I know it sounds wierd, but they like it. My cat purrs when he hears his special song.

Find a toy that she likes, play with her. If's she's an indoor cat, try taking her out on a leash to sniff stuff.

Establish trust and communication and friendship follows. Whlie she may not be a cuddly as she would have been if introduced to humans earlier, you can have a good satisfying relationship if you are willing to put in the time and be patient.