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