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