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