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