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