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