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