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