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