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