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