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