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