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