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