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