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