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