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