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