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