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