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