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)(20,29)(21,25)(22,27)(23,30)(24,31)(28,32)(1,3,5,4)(2,7,8,6)(10,15)(14,16)(17,19,21,28)(18,22,25,23)(20,30,31,27)(24,32,29,26)(9,12,13,11)(10,16,15,14)(19,27)(20,31)(22,26)(23,32)(24,29)(28,30)(1,4,5,3)(2,6,8,7)(17,19)(18,23)(20,30)(21,28)(22,25)(24,26)(27,31)(29,32)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.