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