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