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