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