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