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