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