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