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