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