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