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