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