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