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