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