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