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