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