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