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