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