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