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)(11,13)(12,14)(15,16)(17,18,20,21)(19,23,24,22)(26,29)(27,31)(2,5)(6,7)(9,10,12,14)(11,13,16,15)(18,21)(22,23)(25,26,28,29)(27,30,31,32)(17,19)(18,22)(20,24)(21,23)(25,26)(27,30)(28,29)(31,32) involution — undirected(1,3,4,8)(2,6,5,7)(9,11,12,16)(10,13,14,15)(17,19)(18,23)(20,24)(21,22)(25,27,28,31)(26,30,29,32)(1,2)(3,7)(4,5)(6,8)(9,10)(11,15)(12,14)(13,16)(17,18)(19,22)(20,21)(23,24)(25,26)(27,32)(28,29)(30,31) 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.