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