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