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