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