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