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