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