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