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