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