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