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