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