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