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