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