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