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