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