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