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