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