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