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