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