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