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