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