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