Shock is very common. Make sure she's drinking, put her in a quiet place with low light, and let her rest and calm down and feel safe. If you have a crate, then a crate in a quiet room works well. And it lets you monitor how she's doing, make sure droppings are normal and she's drinking and eating. If being alone stresses her then leave the crate in a cool place with the other chickens so she can see them and they can see her, but remain safe. As long as there are no internal injuries, she should recover fine. She may be sore, depending on where and how hard she was grabbed. She may be nervous and easily startled, and hide for a while, all normal behaviors after an incident like this.