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