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