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