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