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