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