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