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