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