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