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