One vertex per element, one color per generator, with an edge from x to x·s.
(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)(1,2,4,8,5,7,13,15)(3,9,10,14,11,16,12,6)(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)(1,3,5,11)(2,6,7,14)(4,12,13,10)(8,16,15,9)(23,37)(27,41)(38,43)(42,48)(2,7)(6,14)(8,15)(9,16)(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.