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