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