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