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