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