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