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