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