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