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