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