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