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