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