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