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