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