One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18)(19,30)(20,35)(21,27)(22,28)(23,41)(24,29)(25,33)(26,37)(31,47)(32,44)(34,42)(36,43)(38,48)(39,45)(40,46) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,23,33,24,34,22,36)(18,25,28,30,29,43,41,42)(20,31,37,40,38,21,32,39)(26,27,35,46,44,47,48,45)(1,3,5,4)(2,7,8,6)(11,15)(13,16)(17,20,23,37,24,38,22,32)(18,26,28,35,29,44,41,48)(19,31,33,40,34,21,36,39)(25,27,30,46,43,47,42,45)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,21,24,31)(18,27,29,47)(19,32,34,37)(20,36,38,33)(22,40,23,39)(25,35,43,48)(26,30,44,42)(28,46,41,45)(17,22,24,23)(18,28,29,41)(19,33,34,36)(20,32,38,37)(21,39,31,40)(25,42,43,30)(26,35,44,48)(27,45,47,46)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.