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