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