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