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