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