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