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