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