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