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)(25,26,30,31)(27,28,35,32)(29,33,37,38)(34,36,40,39)(1,2,5,4)(3,7,8,6)(9,11,15,12)(10,16,20,17)(13,19,23,21)(14,22,24,18)(26,31)(28,32)(29,37)(34,40)(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)(26,32)(28,31)(29,34)(30,35)(33,39)(36,38)(37,40)(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)(26,27,31,35)(29,36,37,39)(33,34,38,40)(9,13)(10,18)(11,21)(12,19)(14,17)(15,23)(16,24)(20,22)(25,29)(26,33)(27,34)(28,36)(30,37)(31,38)(32,39)(35,40) involution — undirected(9,14)(10,19)(11,22)(12,18)(13,17)(15,24)(16,23)(20,21)(25,27)(26,28)(29,34)(30,35)(31,32)(33,36)(37,40)(38,39) 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.