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