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