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