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