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