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