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