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