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