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