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