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