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