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