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