Hah, there's a vague answer. She does seem sort of closed in on herself, but that could be just because she's trying to juggle a thousand things at once. And she's on the phone... INTPs don't like phones so much.
The INTP I know (she's still young, but...) always has a very individual style - she won't be wearing the latest fashions, or anything, but she knows what she likes and always looks good. Her style isn't so elegant, but that's not to say another INTP's wouldn't be.
It's not exactly a typical INTP's appearance, though. Looking at the photo, I dunno. My first thought was ESxx of some description, though she's wearing mostly dark colours (ISxx?) and seems to be sort of disorganised (xNxP)?
Lol, okay, I'm making wild guesses based on nothing more than whims in my head. Stopping now!