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)(17,18,21,22)(19,25,27,23)(20,24,28,30)(26,32,29,31)(33,34,38,36)(35,41,42,39)(37,44,45,40)(43,46,48,47)(1,3,6,5)(2,7,4,8)(9,10,13,11)(12,14,16,15)(18,22)(20,28)(23,25)(26,29)(35,42)(37,45)(39,41)(40,44)(1,4,6,2)(3,7,5,8)(9,11,13,10)(12,15,16,14)(17,18)(19,23)(20,24)(21,22)(25,27)(26,31)(28,30)(29,32)(33,35,38,42)(34,39,36,41)(37,43,45,48)(40,46,44,47)(1,3,6,5)(2,8,4,7)(9,12)(10,14)(11,15)(13,16)(17,19)(18,23)(20,29)(21,27)(22,25)(24,32)(26,28)(30,31)(33,36,38,34)(35,39,42,41)(37,44,45,40)(43,46,48,47)(1,5,6,3)(2,7,4,8)(17,20)(18,24)(19,26)(21,28)(22,30)(23,31)(25,32)(27,29)(33,37)(34,40)(35,43)(36,44)(38,45)(39,46)(41,47)(42,48)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.