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