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)(11,15)(12,16)(13,14)(17,18,22,26)(19,23,30,37)(20,24,31,38)(21,25,33,40)(27,34,29,36)(28,35,43,47)(32,39,44,48)(41,45,42,46)(1,3)(2,5)(4,8)(6,7)(17,19,22,30)(18,23,26,37)(20,28,31,43)(21,27,33,29)(24,35,38,47)(25,34,40,36)(32,41,44,42)(39,45,48,46)(2,6)(5,7)(10,14)(15,16)(19,27)(20,31)(21,33)(23,34)(24,38)(25,40)(28,42)(29,30)(35,46)(36,37)(41,43)(45,47) involution — undirected(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,20,22,31)(18,24,26,38)(19,28,30,43)(21,32,33,44)(23,35,37,47)(25,39,40,48)(27,41,29,42)(34,45,36,46)(3,8)(5,7)(9,12,13,11)(10,16,14,15)(19,27)(21,33)(23,34)(25,40)(28,41)(29,30)(32,44)(35,45)(36,37)(39,48)(42,43)(46,47)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.