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