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