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)(17,18,21,23)(19,24,27,22)(20,25,29,30)(26,31,32,28)(2,6)(7,8)(9,11,14,10)(12,15,13,16)(18,23)(20,28)(22,24)(25,32)(26,30)(29,31)(1,3,5,4)(2,7,6,8)(9,12,14,13)(10,15,11,16)(17,19)(18,24)(20,26)(21,27)(22,23)(25,31)(28,30)(29,32)(9,13,14,12)(10,16,11,15)(17,20,24,31,21,29,22,28)(18,25,27,32,23,30,19,26)(1,4,5,3)(2,7,6,8)(18,23)(19,27)(20,29)(28,31)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.