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