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