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