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