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