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