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