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