Well i have this problem the administrator group is hidden ! I dont know how to open that ! As its my new forum i dont have any member right now because right now i am constructing it so i dont have any member accept me and i am appearing as a MODERATOR !
I have also check the group member color but still its hidden !
I am very confused please help me !

Edited

To change the type of group (hidden, closed, open) of any group, go to your Admin Control Panel --> Users & Groups --> Group Administration --> Admin Group --> Click this icon --> Change the colour of the group, then put a check in the box that says colour group members. Then change Group Status to Closed (Admin group can't be an Open group) for that colour to show.

You can also do this from the front page by clicking Groups --> Admin (if you're Admin and can see it) --> Group Type --> Click the radiobutton next to Closed. However, you can't change the colour settings from here. Only the type.

This will make the Admin Group show up, and will apply the colour.

Hope this helps!