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