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