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