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