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