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