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