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