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)(19,22,27,25)(20,23,29,32)(26,30,28,31)(33,34)(35,44)(36,37)(38,48)(39,41)(40,45)(42,47)(43,46)(4,11)(7,9)(12,16)(14,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,31)(29,32)(33,35,39,45)(34,40,41,44)(36,46,47,38)(37,48,42,43)(2,3)(7,9)(8,10)(14,15)(34,41)(35,45)(36,47)(43,48) involution — undirected(1,3,6,2)(4,9,11,7)(5,10,13,8)(12,15,16,14)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32)(33,36)(34,42)(35,46)(37,41)(38,45)(39,47)(40,43)(44,48)(1,4,6,11)(2,7,3,9)(5,12,13,16)(8,14,10,15)(17,19,21,27)(18,22,24,25)(20,28,29,26)(23,31,32,30)(33,37,39,42)(34,36,41,47)(35,43,45,48)(38,44,46,40)(1,5,6,13)(2,8,3,10)(4,12,11,16)(7,14,9,15)(17,20,21,29)(18,23,24,32)(19,26,27,28)(22,30,25,31)(33,38,39,46)(34,43,41,48)(35,36,45,47)(37,44,42,40)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.