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