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