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