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