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