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)(14,15)(17,18)(19,24)(20,21)(22,23)(25,26)(27,31)(28,30)(29,32)(9,10)(11,15)(12,13)(14,16)(17,19)(18,21)(20,22)(23,24)(25,26,28,30)(27,29,32,31)(10,13)(14,15)(18,23)(19,20)(27,32)(29,31) involution — undirected(1,3,5,8)(2,6,4,7)(9,10)(11,14)(12,13)(15,16)(17,20,22,19)(18,24,23,21)(25,27,28,32)(26,29,30,31)(1,4,5,2)(3,7,8,6)(9,11,12,16)(10,14,13,15)(17,21,22,24)(18,19,23,20)(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.