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