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