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