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