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