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