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