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