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