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