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