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