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