Not Natively. Meaning just plug them in and Studio One will see them and use them as a cascaded system. This presently is a feature request. I will move this question to the FaderPort 8 Feature Request area.
You can cascade FaderPort 8's using HUI or MCU mode, you'll have to set them to that function in the setup screen on the Faderport 8 itself. Then use the HUI setup screen in Studio One (or your favorite DAW) to order them accordingly.