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