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