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