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