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