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