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