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