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