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