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