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