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