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