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