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