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