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