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