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