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