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