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)(11,13)(12,14)(15,16)(17,18,21,22)(19,20,23,24)(27,31)(29,32)(1,3)(2,7)(4,6)(5,8)(9,11,12,15)(10,13,14,16)(17,19,21,23)(18,20,22,24)(25,26,28,30)(27,29,31,32)(3,4)(5,7)(10,14)(13,16)(18,22)(19,23)(25,27,28,31)(26,29,30,32)(1,4,6,3)(2,7,8,5)(9,10)(11,13)(12,14)(15,16)(17,18)(19,20)(21,22)(23,24)(25,27)(26,29)(28,31)(30,32)(1,5,6,7)(2,3,8,4)(9,11)(10,13)(12,15)(14,16)(17,20)(18,19)(21,24)(22,23)(25,26)(27,29)(28,30)(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.