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