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