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