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