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