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