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