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