This might be a silly question. but It has taken me too long time to fina a simple way to group the same type of data sources like Microsoft IIS. The only way I can do at the moment is to create a gabage Root data source and a bunch of child or client sub-data sources. but this really looks stupid. In ArcSight or Qradar , this can be achieved easily.
Easiest way to do this is to change your display. At the top of your screenshot you've provided, you'll see you are on "Physical Display", which is the default. If you open that popup menu and select "Device Type Display", you should see what you are looking for. You may also want to experiment with your own custom displays (click "Add a Display" in the same menu).