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