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