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