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)(20,30)(22,27)(23,25)(24,28)(26,31)(29,32) involution — undirected(1,2,5,6)(3,7,4,8)(10,13)(14,16)(17,19,24,23)(18,25,28,21)(20,29,31,27)(22,26,32,30)(9,10)(11,14)(12,13)(15,16)(17,20,24,31)(18,26,28,30)(19,29,23,27)(21,22,25,32)(1,3,5,4)(2,7,6,8)(9,11)(10,14)(12,15)(13,16)(17,21,24,25)(18,19,28,23)(20,22,31,32)(26,29,30,27)(1,4,5,3)(2,8,6,7)(17,22)(18,27)(19,26)(20,25)(21,31)(23,30)(24,32)(28,29)(17,23,24,19)(18,25,28,21)(20,27,31,29)(22,26,32,30)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.