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