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