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