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