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