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