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