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