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