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