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