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