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