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