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)(20,23,27,25)(21,24,29,26)(28,30,32,31)(34,38)(35,41)(40,44)(43,47)(3,7)(5,8)(11,15)(13,16)(18,19)(20,27)(24,26)(28,32)(33,34,37,38)(35,42,41,39)(36,44,45,40)(43,46,47,48)(1,3,4,7)(2,5,6,8)(9,11)(10,13)(12,15)(14,16)(17,19,22,18)(20,23,27,25)(21,24,29,26)(28,31,32,30)(33,34)(35,39)(36,44)(37,38)(40,45)(41,42)(43,48)(46,47)(9,10)(11,13)(12,14)(15,16)(17,20,22,27)(18,23,19,25)(21,28,29,32)(24,30,26,31)(33,35,37,41)(34,39,38,42)(36,43,45,47)(40,46,44,48)(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,21,22,29)(18,24,19,26)(20,28,27,32)(23,30,25,31)(33,36,37,45)(34,40,38,44)(35,43,41,47)(39,46,42,48)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.