I would keep it on the sand bed for at least two weeks before moving it someplace else. It definitely needs some time to get used to your tank, and this could be a matter of hours or days. Be patient...
On a side note, if you do happen to keep it on your sand bed, every time you do a water change you might want to lift the coral up off the sand bed and then set it down again. This will keep the edges from getting buried in the sand and receding. GL.