One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(9,10,15,18)(11,13,12,16)(14,22,23,17)(19,24,20,21)(26,31)(28,32)(33,39)(36,40)(2,6)(3,8)(9,11,15,12)(10,16,18,13)(14,19,23,20)(17,24,22,21)(25,26,30,31)(27,32,35,28)(29,33,38,39)(34,40,37,36)(1,3)(2,4)(5,8)(6,7)(9,11,15,12)(10,16,18,13)(14,20,23,19)(17,21,22,24)(25,27,30,35)(26,32,31,28)(29,37,38,34)(33,36,39,40)(1,4)(2,3)(5,7)(6,8)(9,12,15,11)(10,13,18,16)(14,20,23,19)(17,21,22,24)(25,28)(26,27)(29,36)(30,32)(31,35)(33,34)(37,39)(38,40)(1,2)(3,4)(5,6)(7,8)(9,13)(10,12)(11,18)(14,21)(15,16)(17,20)(19,22)(23,24)(25,27)(26,32)(28,31)(29,34)(30,35)(33,40)(36,39)(37,38) involution — undirected(1,4)(2,3)(5,7)(6,8)(9,14,15,23)(10,17,18,22)(11,19,12,20)(13,21,16,24)(25,29,30,38)(26,33,31,39)(27,34,35,37)(28,36,32,40)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.