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