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