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