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)(17,18,22,27)(19,23,29,25)(20,24,30,32)(21,31,28,26)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,29)(18,23,27,25)(20,21,30,28)(24,31,32,26)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19,28,30,22,29,21,20)(18,24,31,25,27,32,26,23)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,20,21,29,22,30,28,19)(18,25,26,24,27,23,31,32)(2,6)(7,8)(10,14)(13,15) 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.