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