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