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)(17,18,23,25,22,20,21,26)(19,27,31,28,30,24,29,32)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19,22,30)(18,24,20,27)(21,29,23,31)(25,32,26,28)(17,20,22,18)(19,28,30,32)(21,26,23,25)(24,31,27,29)(1,3,4,7)(2,6,5,8)(10,14)(13,16)(17,21,22,23)(18,25,20,26)(19,29,30,31)(24,32,27,28)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.