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)(11,13,15,16)(19,20)(23,27)(24,32)(28,29)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,18)(19,27)(20,23)(21,25)(22,31)(24,29)(26,30)(28,32)(1,3,5,4)(2,7,8,6)(10,14)(11,15)(17,19,21,20)(18,23,25,27)(22,28,30,29)(24,26,32,31)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,20,21,19)(18,24,25,32)(22,28,30,29)(23,26,27,31)(2,8)(6,7)(19,20)(23,27)(24,32)(28,29) 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.