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