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