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