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)(19,29)(20,26)(21,27)(22,24)(23,28)(25,31)(30,32)(2,6)(7,8)(9,11,12,15)(10,13,14,16)(18,24)(19,30)(20,23)(21,31)(25,32)(27,29)(1,3,5,4)(2,7,6,8)(10,14)(13,16)(17,19,22,31)(18,25,24,29)(20,30,23,21)(26,27,28,32)(1,3,5,4)(2,7,6,8)(17,20)(18,26)(21,30)(22,23)(24,28)(27,32)(1,4,5,3)(2,8,6,7)(17,21)(18,27)(19,20)(22,30)(23,31)(24,32)(25,28)(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.