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