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