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