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