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