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