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