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)(11,14)(12,16)(13,15)(17,18)(19,24)(20,25)(21,23)(22,26)(27,38)(28,37)(29,33)(30,40)(31,35)(32,34)(36,42)(39,44)(41,47)(43,45)(46,48) involution — undirected(2,5)(6,8)(9,11,13,12)(10,14,15,16)(18,23)(19,27)(20,30)(22,31)(24,36)(25,39)(28,43)(29,42)(32,44)(33,38)(34,40)(46,47)(9,12,13,11)(10,14,15,16)(17,19,22,27,21,29,31,42)(18,24,26,38,23,33,35,36)(20,28,30,41,32,43,44,48)(25,37,40,47,34,45,39,46)(17,20,31,44,21,32,22,30)(18,25,35,39,23,34,26,40)(19,28,42,48,29,43,27,41)(24,37,36,46,33,45,38,47)(1,3,4,7)(2,6,5,8)(19,29)(24,33)(27,42)(28,43)(36,38)(37,45)(41,48)(46,47)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.