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