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