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)(11,13)(12,15)(14,16)(17,18,23,22)(19,24,30,28)(20,25,21,26)(27,32,29,31)(1,3,5,4)(2,6,7,8)(9,11,13,10)(12,15,16,14)(17,19,23,30)(18,24,22,28)(20,31,21,32)(25,27,26,29)(1,4,5,3)(2,6,7,8)(10,11)(14,15)(17,20,23,21)(18,25,22,26)(19,27,30,29)(24,32,28,31)(9,12,13,16)(10,14,11,15)(17,18,23,22)(19,28,30,24)(20,25,21,26)(27,31,29,32)(17,21,23,20)(18,26,22,25)(19,29,30,27)(24,31,28,32)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.