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