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