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