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