When I first got my veiled, he would “paw” at the sides of his enclosure and lay around while puffed up.
This behavior isn’t unusual for a new chameleon, as they may be stressed while adjusting to their new environment. I believe your chameleon is expressing dislike of his/her new environment, but I’m sure this behavior will fade away as time goes on.
If you have had this chameleon for a while, then I would be concerned. As Beman notes, this behavior could signal that something is off in your chameleon’s environment.