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