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