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