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