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