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