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