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)(11,15)(12,14)(13,16)(17,18,22,19)(20,27,31,28)(21,24,29,25)(23,32,26,30)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,18)(20,28,31,27)(21,25,29,24)(23,30,26,32)(10,14)(11,16)(17,20,29,32,22,31,21,30)(18,23,24,28,19,26,25,27)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20,21,30,22,31,29,32)(18,23,25,27,19,26,24,28)(2,5)(6,8)(10,14)(13,15)(17,21,22,29)(18,24,19,25)(20,30,31,32)(23,28,26,27)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.