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