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