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