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