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