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