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