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