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