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