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