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