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