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