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