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