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