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