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