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