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