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