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