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)(19,29)(20,32)(21,26)(22,27)(23,28)(24,30)(25,31)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,21,20,23,31,22,30)(18,24,27,25,28,32,26,29)(1,3,5,4)(2,7,8,6)(11,15)(13,16)(17,20,22,19,23,30,21,31)(18,25,26,24,28,29,27,32)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,18)(19,24)(20,25)(21,27)(22,26)(23,28)(29,30)(31,32)(17,21,23,22)(18,26,28,27)(19,20,31,30)(24,29,32,25)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.