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)(17,18,21,25)(19,27,29,24)(20,22,26,23)(28,30,32,31)(2,5)(6,7)(9,10)(11,15)(12,16)(13,14)(17,19,21,29)(18,24,25,27)(20,28,26,32)(22,31,23,30)(10,14)(15,16)(17,18,22,20,21,25,23,26)(19,28,30,24,29,32,31,27)(9,11,13,12)(10,15,14,16)(17,20,22,25,21,26,23,18)(19,24,30,32,29,27,31,28)(1,3,4,8)(2,6,5,7)(9,12,13,11)(10,16,14,15)(18,25)(20,26)(24,27)(28,32)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.