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