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