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