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