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