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