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