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