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