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