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