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