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