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