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