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