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