One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,6)(5,7)(9,10,12,14)(11,15,16,13)(17,18,23,20)(19,24,28,29)(21,25,27,30)(22,26,32,31)(1,3,5,4)(2,6,7,8)(17,19)(18,24)(20,29)(21,26)(22,30)(23,28)(25,32)(27,31)(9,11,12,16)(10,13,14,15)(17,20,23,18)(19,27,28,21)(22,26,32,31)(24,30,29,25)(1,4,5,3)(2,6,7,8)(17,21)(18,25)(19,26)(20,30)(22,29)(23,27)(24,32)(28,31)(19,25)(21,29)(22,32)(24,27)(26,31)(28,30) involution — undirectedA 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.