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