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