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