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