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