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