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