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