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