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