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