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