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