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