Free goup tours are available and can be arranged by submitting the form under "plan your visit" on this page: www.bahai.us/bahai-temple
Haven't seen any tours happening here. You can just visit and look around, there may be local knowledgeable people to help at times with the history of the place and the community.
You don't need somebody to show you the place ,ones you get there they have flayers on different languages and people's who tell everyone to keep quiet and don't take pictures inside the building only out side...
Thanks! Your answer is awaiting moderation.