The short answer is, yes!
Absolutely you should take photos and document the scene, the vehicles, their positions, and any surface markings on the street or pavement following the collision. It is vital to document as much evidence as possible before it is altered. Even a few hours later, events can completely alter the scene as it was when the collision occurred, so photos are usually the best way to preserve everything at the scene of the collision. Traffic flow, rain or wind, or EMS and police officers removing debris can all result in vital information being lost. If you are involved in a car accident, take pictures.