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