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