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