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