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