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