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