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