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