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