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