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