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