Should I say that she "draped over the towel on her hair" or " draped on the towel on her hairs"? or should I use wrapped instead of draped?
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Please include the research you've done, or consider if your question suits our English Language Learners site better. Questions that can be answered using commonly-available references are off-topic." – Nicole, Hellion, Chenmunka, tchrist, Misti
drape means thing is covered, but not encircled; the cloth that is draped does not go under the thing being covered.
wrap means to surround completely
So if she did not enclose all her hair in the towel, she draped the towel over (or on) her hair.
If she got virtually all of her hair inside the towel, so you couldn't see it (as in a turban, http://www.google.com/search?q=hair+towel+turban&ie=UTF-8&oe=UTF-8&hl=en then you'd say she wrapped her hair.
However, your syntax is wrong.
She draped the towel over her hair.
She wrapped the towel around her hair. (or She wrapped up her hair in a towel.)
As used here, "hair" is a mass noun ; we do not use plural to mean all of one's hair.