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