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