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