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