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