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)(17,18,21,24)(19,26,27,23)(20,22,25,31)(28,30,29,32)(1,3,5,4,6,12,15,13)(2,7,9,11,10,16,14,8)(17,19,21,27)(18,23,24,26)(20,30,25,32)(22,28,31,29)(3,12)(4,13)(7,16)(8,11)(17,20,22,24,21,25,31,18)(19,23,28,30,27,26,29,32)(1,4,5,12,6,13,15,3)(2,8,9,7,10,11,14,16)(18,24)(20,25)(23,26)(30,32)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.