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