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