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