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