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