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