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