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