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