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