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