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