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