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