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