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