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