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