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