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)(11,16)(12,14)(13,15)(17,18,22,27)(19,29,33,24)(20,34,36,25)(21,26,23,28)(30,39,47,45)(31,41,32,40)(35,42,46,48)(37,44,38,43)(2,5)(6,8)(17,19,22,33)(18,24,27,29)(20,35,36,46)(21,32,23,31)(25,42,34,48)(26,41,28,40)(30,38,47,37)(39,44,45,43)(9,11,13,12)(10,14,15,16)(17,20,22,36)(18,25,27,34)(19,30,33,47)(21,37,23,38)(24,39,29,45)(26,43,28,44)(31,35,32,46)(40,42,41,48)(9,12,13,11)(10,14,15,16)(19,31)(20,36)(21,23)(24,40)(25,34)(26,28)(29,41)(30,46)(32,33)(35,47)(39,48)(42,45)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,26,27,28)(19,32,33,31)(20,37,36,38)(24,41,29,40)(25,43,34,44)(30,46,47,35)(39,48,45,42)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.