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