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