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