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