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