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