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