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