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