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