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