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)(11,14)(12,16)(13,15)(17,18)(19,24)(20,29)(21,26)(22,25)(23,27)(28,31)(30,32) involution — undirected(1,3,4,8)(2,5,6,7)(9,11,13,12)(10,14,15,16)(19,28)(20,22)(21,30)(24,31)(25,29)(26,32)(9,12,13,11)(10,14,15,16)(17,19,23,26)(18,24,27,21)(20,28,22,32)(25,30,29,31)(2,6)(5,7)(17,20,23,22)(18,25,27,29)(19,28,26,32)(21,31,24,30)(3,8)(5,7)(17,21,23,24)(18,26,27,19)(20,30,22,31)(25,28,29,32)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.