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