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