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