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