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