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