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