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