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