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