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