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