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