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