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