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