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