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)(19,28)(20,25)(21,26)(22,31)(23,27)(24,29)(30,32)(33,34,37,42,38,41,36,40)(35,43,45,48,44,39,46,47)(1,3)(2,7)(4,12)(5,13)(6,14)(8,15)(9,16)(10,11)(17,19,23,20)(18,24,27,32)(21,29,22,30)(25,31,28,26)(33,35)(34,39)(36,45)(37,46)(38,44)(40,47)(41,43)(42,48)(1,4,6,5)(2,8,10,9)(3,12,14,13)(7,15,11,16)(17,20,23,19)(18,25,27,28)(21,29,22,30)(24,31,32,26)(35,44)(39,43)(45,46)(47,48)(1,5,6,4)(2,9,10,8)(3,13,14,12)(7,16,11,15)(17,21,23,22)(18,26,27,31)(19,29,20,30)(24,25,32,28)(33,36,38,37)(34,40,41,42)(35,45,44,46)(39,47,43,48)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.