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