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