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