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