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