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