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)(11,16)(12,14)(13,15)(17,18,21,22)(19,23,24,20)(25,26,29,32)(27,31,28,30)(2,5)(6,8)(9,11,14,13)(10,15,12,16)(17,18)(19,23)(20,24)(21,22)(27,28)(30,31)(3,7)(6,8)(11,13)(15,16)(18,22)(20,23)(25,27,29,28)(26,30,32,31)(1,2)(3,6)(4,5)(7,8)(9,12,14,10)(11,15,13,16)(17,19,21,24)(18,23,22,20)(25,28,29,27)(26,31,32,30)(1,3,4,7)(2,6,5,8)(9,13,14,11)(10,15,12,16)(17,20,21,23)(18,24,22,19)(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.