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