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