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)(19,28)(20,32)(21,26)(22,29)(23,27)(24,25)(30,31)(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,26)(21,25)(22,31)(23,32)(27,30)(28,29) involution — undirected(10,13)(14,16)(17,20,23,28)(18,25,27,31)(19,29,32,26)(21,24,22,30)(1,3,5,4)(2,7,6,8)(9,11)(10,14)(12,15)(13,16)(17,18)(19,30)(20,25)(21,29)(22,26)(23,27)(24,32)(28,31)(1,4,5,3)(2,8,6,7)(11,15)(14,16)(17,21,23,22)(18,26,27,29)(19,31,32,25)(20,24,28,30)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.