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