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