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