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