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