One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(10,14)(11,12)(17,18,23,27)(19,24,22,37)(20,30,33,38)(21,34,36,26)(25,31,41,28)(29,42,35,39)(32,46,47,44)(40,43,48,45)(1,3)(2,5)(4,7)(6,8)(9,10)(11,16)(12,15)(13,14)(17,19,23,22)(18,24,27,37)(20,31,33,28)(21,35,36,29)(25,30,41,38)(26,42,34,39)(32,43,47,45)(40,46,48,44)(3,7)(5,8)(9,11,13,12)(10,15,14,16)(17,20)(18,25)(19,28)(21,32)(22,31)(23,33)(24,38)(26,40)(27,41)(29,43)(30,37)(34,48)(35,45)(36,47)(39,46)(42,44)(2,6)(3,7)(9,11,13,12)(10,16,14,15)(17,21,23,36)(18,26,27,34)(19,29,22,35)(20,32,33,47)(24,39,37,42)(25,40,41,48)(28,43,31,45)(30,44,38,46)(3,7)(5,8)(9,12,13,11)(10,16,14,15)(20,33)(21,36)(25,41)(26,34)(28,31)(29,35)(30,38)(39,42)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.