One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,15,16,13)(17,18,24,28)(19,25,30,20)(21,32,29,26)(22,27,31,23)(9,11,12,16)(10,13,14,15)(17,19)(18,25)(20,28)(21,27)(22,26)(23,29)(24,30)(31,32)(1,2,4,6)(3,5,8,7)(17,20)(18,19)(21,31)(22,29)(23,32)(24,25)(26,27)(28,30)(1,2)(3,5)(4,6)(7,8)(17,21,24,29)(18,26,28,32)(19,27,30,23)(20,31,25,22)(1,3,4,8)(2,5,6,7)(17,22,24,31)(18,27,28,23)(19,26,30,32)(20,29,25,21)(17,23,24,27)(18,22,28,31)(19,29,30,21)(20,32,25,26)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.