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