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