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