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