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