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