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