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