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