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