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