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