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