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