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