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