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