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