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