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