|The best way to approach this woman is not to approach her at all. You've tried, and it's been thrown back in your face. You are friendly with everyone else, and, for whatever reason, she has decided that she does not want to be friendly with you. It's her problem, and her loss.|
Now, if you need to have more interaction with her because of your job responsibilities, or if she is taking active steps to interfere with your work, that is another story, and it would probably call for a visit with your manager.
At this point, you can throw an occasional hello her way and see if has decided that you might be worthy of a sentence. Other than that, if you do not need to deal with her, you should stop wanting to deal with her. By focusing on her, all you will do is get yourself upset and distracted.
It makes far more sense to focus on the satisfying aspects of your job. This can include your work responsibilities, opportunities for growth and achievement, and dealings with your fellow personable employees. When it comes to dealing with this co-worker who grunts and shrugs, just shrug it off.