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