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