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