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