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)(11,16)(12,15)(13,14)(17,18)(19,22)(20,21)(23,24)(25,26,29,32)(27,30,31,28)(2,6)(4,7)(10,13)(15,16)(18,20)(22,24)(25,27,29,31)(26,30,32,28)(9,11,14,12)(10,15,13,16)(17,18,21,20)(19,22,23,24)(25,28,29,30)(26,31,32,27)(1,3,5,8)(2,7,6,4)(9,12,14,11)(10,15,13,16)(17,19)(18,22)(20,24)(21,23)(1,4,5,7)(2,3,6,8)(9,13,14,10)(11,16,12,15)(17,20,21,18)(19,22,23,24)(25,26)(27,30)(28,31)(29,32)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.