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