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