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