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