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