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