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