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