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