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