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