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