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