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