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