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