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)(14,15)(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)(18,23)(20,22)(21,27)(24,25)(26,31)(28,30)(29,32)(9,10)(11,15)(12,13)(14,16)(18,24)(19,20)(26,29)(27,28) involution — undirected(9,11,12,16)(10,14,13,15)(17,20,22,19)(18,25,24,23)(21,28,30,27)(26,32,29,31)(17,18)(19,23)(20,25)(21,26)(22,24)(27,31)(28,32)(29,30) involution — undirected(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.