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