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