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