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