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