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