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