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