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