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