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