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