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