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