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