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)(11,15)(12,16)(13,14)(17,18)(19,26)(20,28)(21,22)(23,24)(25,27)(29,31)(30,32) involution — undirected(2,5)(3,7)(10,14)(11,12)(17,19,22,23)(18,24,21,26)(20,27,30,31)(25,28,29,32)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,27)(21,29)(22,30)(23,31)(24,28)(26,32)(1,3,4,7)(2,6,5,8)(10,14)(15,16)(17,21,22,18)(19,26,23,24)(20,29,30,25)(27,32,31,28)(2,5)(6,8)(9,12,13,11)(10,15,14,16)(18,21)(24,26)(25,29)(28,32)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.