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