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