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)(11,16)(12,17)(13,23)(14,19)(15,20)(18,22)(21,24)(26,32)(28,36)(29,33)(35,38)(2,5)(6,7)(9,10)(11,21)(12,17)(13,18)(14,19)(15,20)(16,24)(22,23)(25,26,31,32)(27,33,30,29)(28,34,36,39)(35,40,38,37)(1,2)(3,6)(4,5)(7,8)(9,11,15,24)(10,16,20,21)(12,22,19,13)(14,23,17,18)(25,27,31,30)(26,33,32,29)(28,35,36,38)(34,40,39,37)(1,2)(3,6)(4,5)(7,8)(9,12)(10,17)(11,22)(13,24)(14,20)(15,19)(16,18)(21,23)(25,28)(26,34)(27,35)(29,37)(30,38)(31,36)(32,39)(33,40) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,13,15,22)(10,18,20,23)(11,12,24,19)(14,21,17,16)(25,29)(26,27)(28,37)(30,32)(31,33)(34,35)(36,40)(38,39)(9,14,15,17)(10,19,20,12)(11,23,24,18)(13,21,22,16)(25,30,31,27)(26,29,32,33)(28,35,36,38)(34,40,39,37)A 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.