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