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