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