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)(17,18,23,28)(19,29,33,39)(20,34,35,42)(21,27,22,26)(24,32,40,31)(25,37,41,36)(30,44,45,38)(43,47,48,46)(1,2,6,10)(3,8,13,16)(4,7,5,9)(11,15,12,14)(17,19,23,33)(18,24,28,40)(20,30,35,45)(21,32,22,31)(25,38,41,44)(26,39,27,29)(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)(21,36)(22,37)(23,35)(24,38)(26,34)(27,42)(28,41)(29,43)(31,46)(32,47)(33,45)(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)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,36,35,37)(24,29,40,39)(25,34,41,42)(30,46,45,47)(38,43,44,48)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.