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