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