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