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