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