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