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