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)(19,25)(20,34)(21,39)(22,28)(23,29)(24,30)(26,37)(27,33)(31,42)(32,41)(35,40)(36,45)(38,44)(43,46)(47,48)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,25)(20,35)(21,22)(23,32)(24,33)(26,42)(27,30)(28,39)(29,41)(31,37)(34,40)(36,47)(38,46)(43,44)(45,48) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,20,23,37,24,38,22,36)(18,26,28,34,30,45,29,44)(19,31,21,35,33,47,32,46)(25,40,41,42,27,43,39,48)(1,4,5,3)(2,8,6,7)(10,14)(13,15)(17,21,23,33,24,32,22,19)(18,27,28,39,30,25,29,41)(20,35,37,47,38,46,36,31)(26,43,34,48,45,40,44,42)(2,6)(7,8)(10,14)(13,15)(17,22,24,23)(18,28,30,29)(19,21,33,32)(20,36,38,37)(25,39,27,41)(26,34,45,44)(31,35,47,46)(40,48,43,42)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.