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