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