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