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