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