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