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