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