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