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