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