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