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