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