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