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