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