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